UVA774 Driving in City Squares

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=715 [PDF](https://uva.onlinejudge.org/external/7/p774.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA774/e8344f315d7ca6da2f6c7d8b685d51bd4bdcd0e5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA774/afa79be58fccdcb2a207fbc41979d9a64222485c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA774/614e594411f32d3393ced1b1c450d38a4503f4be.png)